Resumen: This paper aims to contribute to the study of the concept of writer's visibility inspired by approaches to the analysis of identity in written discourse (see Ivanic 1998, Charles 1999 and John 2005). The way medical academic writers selfrepresent themselves in their research articles can be seen in terms of a gradable visibility cline crafted and constrained by the academic genre expectations of these texts (Swales and Feak 2004; Stock and Eik-Nes 2016). Traditionally, authorial visibility has been studied within frameworks such as evaluation, authorial voice and stance. Still, there is no framework as yet been proposed that binds together possible textual realisations that can be considered as visibility features in academic written texts. This paper conducts a study of 40 medical research articles that reveal different manifestations of the authors' presence. A cline is proposed that encompasses different lexico-grammatical realisations such as self-mentions, passive constructions and non-animated subjects followed by active verbs. These features can be interpreted as authorial voice realisations that allow us to measure or grade writers' visibility and its rhetorical implication in the text. Idioma: Inglés DOI: 10.5817/BSE2019-2-3 Año: 2019 Publicado en: Brno Studies in English 45, 2 (2019), 53-76 ISSN: 0524-6881 Factor impacto SCIMAGO: 0.157 - Literature and Literary Theory (Q1) - Language and Linguistics (Q2) - Linguistics and Language (Q2)